<Swing Dev> Replace concat String to append in StringBuilder parameters

[Wang Weijun]

New webrevs available at

  http://cr.openjdk.java.net/~weijun/8055723/client/webrev.01/
  http://cr.openjdk.java.net/~weijun/8055723/core/webrev.01/  

There are only 2 now. Everything non-client is in core.

Everyone, please do code review quickly because the patch touches too many files and any delay could mean re-merge.

*Otávio*: If there is only small change in feedback, tell me to update my own repo and you don't need to generate the big patch again.

I see you still include that demo file.

Thanks
Max